An Instagram video has captured a five-year-old golden retriever from Canandaigua, NY, named Finley, demonstrating its ability to fit several tennis balls into its mouth at the same time. The doggy's official account posted a comment on the video saying that Finley is now working to stuff six balls in its mouth and his mommy-owner is completing paperwork so the amazing retriever can lay claim to the title of the world's record-breaker.